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mips: xburst: remove remainders of dead board

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Commit 54e458de deleted qi_lb60 board support
because of the incompatible license issue.

There is no board with XBurst CPU.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
master
Masahiro Yamada 11 years ago committed by Daniel Schwierzeck
parent 79fd7e649e
commit 7e3d473b5e
8 changed files with 0 additions and 843 deletions
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  1. 1
      README
  2. 9
      arch/mips/cpu/xburst/Makefile
  3. 16
      arch/mips/cpu/xburst/config.mk
  4. 136
      arch/mips/cpu/xburst/cpu.c
  5. 235
      arch/mips/cpu/xburst/jz4740.c
  6. 118
      arch/mips/cpu/xburst/jz_serial.c
  7. 179
      arch/mips/cpu/xburst/start.S
  8. 149
      arch/mips/cpu/xburst/timer.c

1
README
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@ -164,7 +164,6 @@ Directory Hierarchy:
/mips Files generic to MIPS architecture
/cpu CPU specific files
/mips32 Files specific to MIPS32 CPUs
/xburst Files specific to Ingenic XBurst CPUs
/lib Architecture specific library files
/nds32 Files generic to NDS32 architecture
/cpu CPU specific files

9
arch/mips/cpu/xburst/Makefile
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#
# Copyright (C) 2011 Xiangfu Liu <xiangfu@openmobilefree.net>
#
# SPDX-License-Identifier: GPL-2.0+
#
extra-y = start.o
obj-y = cpu.o timer.o jz_serial.o
obj-$(CONFIG_JZ4740) += jz4740.o

16
arch/mips/cpu/xburst/config.mk
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#
# Copyright (C) 2011 Xiangfu Liu <xiangfu@openmobilefree.net>
#
# SPDX-License-Identifier: GPL-2.0+
#
PLATFORM_CPPFLAGS += -march=mips32
PLATFORM_CPPFLAGS += -mabi=32 -DCONFIG_32BIT
ifdef CONFIG_SYS_BIG_ENDIAN
PLATFORM_LDFLAGS += -m elf32btsmip
else
PLATFORM_LDFLAGS += -m elf32ltsmip
endif
CONFIG_STANDALONE_LOAD_ADDR ?= 0x80200000 \
-T $(srctree)/examples/standalone/mips.lds

136
arch/mips/cpu/xburst/cpu.c
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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
* (C) Copyright 2011
* Xiangfu Liu <xiangfu@openmobilefree.net>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <netdev.h>
#include <asm/mipsregs.h>
#include <asm/cacheops.h>
#include <asm/reboot.h>
#include <asm/io.h>
#include <asm/jz4740.h>
#define cache_op(op, addr) \
__asm__ __volatile__( \
".set push\n" \
".set noreorder\n" \
".set mips3\n" \
"cache %0, %1\n" \
".set pop\n" \
: \
: "i" (op), "R" (*(unsigned char *)(addr)))
void __attribute__((weak)) _machine_restart(void)
{
struct jz4740_wdt *wdt = (struct jz4740_wdt *)JZ4740_WDT_BASE;
struct jz4740_tcu *tcu = (struct jz4740_tcu *)JZ4740_TCU_BASE;
u16 tmp;
/* wdt_select_extalclk() */
tmp = readw(&wdt->tcsr);
tmp &= ~(WDT_TCSR_EXT_EN | WDT_TCSR_RTC_EN | WDT_TCSR_PCK_EN);
tmp |= WDT_TCSR_EXT_EN;
writew(tmp, &wdt->tcsr);
/* wdt_select_clk_div64() */
tmp = readw(&wdt->tcsr);
tmp &= ~WDT_TCSR_PRESCALE_MASK;
tmp |= WDT_TCSR_PRESCALE64,
writew(tmp, &wdt->tcsr);
writew(100, &wdt->tdr); /* wdt_set_data(100) */
writew(0, &wdt->tcnt); /* wdt_set_count(0); */
writel(TCU_TSSR_WDTSC, &tcu->tscr); /* tcu_start_wdt_clock */
writeb(readb(&wdt->tcer) | WDT_TCER_TCEN, &wdt->tcer); /* wdt start */
while (1)
;
}
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
_machine_restart();
fprintf(stderr, "*** reset failed ***\n");
return 0;
}
void flush_cache(ulong start_addr, ulong size)
{
unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
unsigned long addr = start_addr & ~(lsize - 1);
unsigned long aend = (start_addr + size - 1) & ~(lsize - 1);
for (; addr <= aend; addr += lsize) {
cache_op(HIT_WRITEBACK_INV_D, addr);
cache_op(HIT_INVALIDATE_I, addr);
}
}
void flush_dcache_range(ulong start_addr, ulong stop)
{
unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
unsigned long addr = start_addr & ~(lsize - 1);
unsigned long aend = (stop - 1) & ~(lsize - 1);
for (; addr <= aend; addr += lsize)
cache_op(HIT_WRITEBACK_INV_D, addr);
}
void invalidate_dcache_range(ulong start_addr, ulong stop)
{
unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
unsigned long addr = start_addr & ~(lsize - 1);
unsigned long aend = (stop - 1) & ~(lsize - 1);
for (; addr <= aend; addr += lsize)
cache_op(HIT_INVALIDATE_D, addr);
}
void flush_icache_all(void)
{
u32 addr, t = 0;
__asm__ __volatile__("mtc0 $0, $28"); /* Clear Taglo */
__asm__ __volatile__("mtc0 $0, $29"); /* Clear TagHi */
for (addr = CKSEG0; addr < CKSEG0 + CONFIG_SYS_ICACHE_SIZE;
addr += CONFIG_SYS_CACHELINE_SIZE) {
cache_op(INDEX_STORE_TAG_I, addr);
}
/* invalidate btb */
__asm__ __volatile__(
".set mips32\n\t"
"mfc0 %0, $16, 7\n\t"
"nop\n\t"
"ori %0,2\n\t"
"mtc0 %0, $16, 7\n\t"
".set mips2\n\t"
:
: "r" (t));
}
void flush_dcache_all(void)
{
u32 addr;
for (addr = CKSEG0; addr < CKSEG0 + CONFIG_SYS_DCACHE_SIZE;
addr += CONFIG_SYS_CACHELINE_SIZE) {
cache_op(INDEX_WRITEBACK_INV_D, addr);
}
__asm__ __volatile__("sync");
}
void flush_cache_all(void)
{
flush_dcache_all();
flush_icache_all();
}

235
arch/mips/cpu/xburst/jz4740.c
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/*
* Jz4740 common routines
* Copyright (c) 2006 Ingenic Semiconductor, <jlwei@ingenic.cn>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <asm/io.h>
#include <asm/jz4740.h>
void enable_interrupts(void)
{
}
int disable_interrupts(void)
{
return 0;
}
/*
* PLL output clock = EXTAL * NF / (NR * NO)
* NF = FD + 2, NR = RD + 2
* NO = 1 (if OD = 0), NO = 2 (if OD = 1 or 2), NO = 4 (if OD = 3)
*/
void pll_init(void)
{
struct jz4740_cpm *cpm = (struct jz4740_cpm *)JZ4740_CPM_BASE;
register unsigned int cfcr, plcr1;
int n2FR[33] = {
0, 0, 1, 2, 3, 0, 4, 0, 5, 0, 0, 0, 6, 0, 0, 0,
7, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0,
9
};
int div[5] = {1, 3, 3, 3, 3}; /* divisors of I:S:P:L:M */
int nf, pllout2;
cfcr = CPM_CPCCR_CLKOEN |
CPM_CPCCR_PCS |
(n2FR[div[0]] << CPM_CPCCR_CDIV_BIT) |
(n2FR[div[1]] << CPM_CPCCR_HDIV_BIT) |
(n2FR[div[2]] << CPM_CPCCR_PDIV_BIT) |
(n2FR[div[3]] << CPM_CPCCR_MDIV_BIT) |
(n2FR[div[4]] << CPM_CPCCR_LDIV_BIT);
pllout2 = (cfcr & CPM_CPCCR_PCS) ?
CONFIG_SYS_CPU_SPEED : (CONFIG_SYS_CPU_SPEED / 2);
/* Init USB Host clock, pllout2 must be n*48MHz */
writel(pllout2 / 48000000 - 1, &cpm->uhccdr);
nf = CONFIG_SYS_CPU_SPEED * 2 / CONFIG_SYS_EXTAL;
plcr1 = ((nf - 2) << CPM_CPPCR_PLLM_BIT) | /* FD */
(0 << CPM_CPPCR_PLLN_BIT) | /* RD=0, NR=2 */
(0 << CPM_CPPCR_PLLOD_BIT) | /* OD=0, NO=1 */
(0x20 << CPM_CPPCR_PLLST_BIT) | /* PLL stable time */
CPM_CPPCR_PLLEN; /* enable PLL */
/* init PLL */
writel(cfcr, &cpm->cpccr);
writel(plcr1, &cpm->cppcr);
}
void sdram_init(void)
{
struct jz4740_emc *emc = (struct jz4740_emc *)JZ4740_EMC_BASE;
register unsigned int dmcr0, dmcr, sdmode, tmp, cpu_clk, mem_clk, ns;
unsigned int cas_latency_sdmr[2] = {
EMC_SDMR_CAS_2,
EMC_SDMR_CAS_3,
};
unsigned int cas_latency_dmcr[2] = {
1 << EMC_DMCR_TCL_BIT, /* CAS latency is 2 */
2 << EMC_DMCR_TCL_BIT /* CAS latency is 3 */
};
int div[] = {1, 2, 3, 4, 6, 8, 12, 16, 24, 32};
cpu_clk = CONFIG_SYS_CPU_SPEED;
mem_clk = cpu_clk * div[__cpm_get_cdiv()] / div[__cpm_get_mdiv()];
writel(0, &emc->bcr); /* Disable bus release */
writew(0, &emc->rtcsr); /* Disable clock for counting */
/* Fault DMCR value for mode register setting*/
#define SDRAM_ROW0 11
#define SDRAM_COL0 8
#define SDRAM_BANK40 0
dmcr0 = ((SDRAM_ROW0 - 11) << EMC_DMCR_RA_BIT) |
((SDRAM_COL0 - 8) << EMC_DMCR_CA_BIT) |
(SDRAM_BANK40 << EMC_DMCR_BA_BIT) |
(SDRAM_BW16 << EMC_DMCR_BW_BIT) |
EMC_DMCR_EPIN |
cas_latency_dmcr[((SDRAM_CASL == 3) ? 1 : 0)];
/* Basic DMCR value */
dmcr = ((SDRAM_ROW - 11) << EMC_DMCR_RA_BIT) |
((SDRAM_COL - 8) << EMC_DMCR_CA_BIT) |
(SDRAM_BANK4 << EMC_DMCR_BA_BIT) |
(SDRAM_BW16 << EMC_DMCR_BW_BIT) |
EMC_DMCR_EPIN |
cas_latency_dmcr[((SDRAM_CASL == 3) ? 1 : 0)];
/* SDRAM timimg */
ns = 1000000000 / mem_clk;
tmp = SDRAM_TRAS / ns;
if (tmp < 4)
tmp = 4;
if (tmp > 11)
tmp = 11;
dmcr |= (tmp - 4) << EMC_DMCR_TRAS_BIT;
tmp = SDRAM_RCD / ns;
if (tmp > 3)
tmp = 3;
dmcr |= tmp << EMC_DMCR_RCD_BIT;
tmp = SDRAM_TPC / ns;
if (tmp > 7)
tmp = 7;
dmcr |= tmp << EMC_DMCR_TPC_BIT;
tmp = SDRAM_TRWL / ns;
if (tmp > 3)
tmp = 3;
dmcr |= tmp << EMC_DMCR_TRWL_BIT;
tmp = (SDRAM_TRAS + SDRAM_TPC) / ns;
if (tmp > 14)
tmp = 14;
dmcr |= ((tmp + 1) >> 1) << EMC_DMCR_TRC_BIT;
/* SDRAM mode value */
sdmode = EMC_SDMR_BT_SEQ |
EMC_SDMR_OM_NORMAL |
EMC_SDMR_BL_4 |
cas_latency_sdmr[((SDRAM_CASL == 3) ? 1 : 0)];
/* Stage 1. Precharge all banks by writing SDMR with DMCR.MRSET=0 */
writel(dmcr, &emc->dmcr);
writeb(0, JZ4740_EMC_SDMR0 | sdmode);
/* Wait for precharge, > 200us */
tmp = (cpu_clk / 1000000) * 1000;
while (tmp--)
;
/* Stage 2. Enable auto-refresh */
writel(dmcr | EMC_DMCR_RFSH, &emc->dmcr);
tmp = SDRAM_TREF / ns;
tmp = tmp / 64 + 1;
if (tmp > 0xff)
tmp = 0xff;
writew(tmp, &emc->rtcor);
writew(0, &emc->rtcnt);
/* Divisor is 64, CKO/64 */
writew(EMC_RTCSR_CKS_64, &emc->rtcsr);
/* Wait for number of auto-refresh cycles */
tmp = (cpu_clk / 1000000) * 1000;
while (tmp--)
;
/* Stage 3. Mode Register Set */
writel(dmcr0 | EMC_DMCR_RFSH | EMC_DMCR_MRSET, &emc->dmcr);
writeb(0, JZ4740_EMC_SDMR0 | sdmode);
/* Set back to basic DMCR value */
writel(dmcr | EMC_DMCR_RFSH | EMC_DMCR_MRSET, &emc->dmcr);
/* everything is ok now */
}
DECLARE_GLOBAL_DATA_PTR;
void calc_clocks(void)
{
unsigned int pllout;
unsigned int div[10] = {1, 2, 3, 4, 6, 8, 12, 16, 24, 32};
pllout = __cpm_get_pllout();
gd->cpu_clk = pllout / div[__cpm_get_cdiv()];
gd->arch.sys_clk = pllout / div[__cpm_get_hdiv()];
gd->arch.per_clk = pllout / div[__cpm_get_pdiv()];
gd->mem_clk = pllout / div[__cpm_get_mdiv()];
gd->arch.dev_clk = CONFIG_SYS_EXTAL;
}
void rtc_init(void)
{
struct jz4740_rtc *rtc = (struct jz4740_rtc *)JZ4740_RTC_BASE;
while (!(readl(&rtc->rcr) & RTC_RCR_WRDY))
;
writel(readl(&rtc->rcr) | RTC_RCR_AE, &rtc->rcr); /* enable alarm */
while (!(readl(&rtc->rcr) & RTC_RCR_WRDY))
;
writel(0x00007fff, &rtc->rgr); /* type value */
while (!(readl(&rtc->rcr) & RTC_RCR_WRDY))
;
writel(0x0000ffe0, &rtc->hwfcr); /* Power on delay 2s */
while (!(readl(&rtc->rcr) & RTC_RCR_WRDY))
;
writel(0x00000fe0, &rtc->hrcr); /* reset delay 125ms */
}
/* U-Boot common routines */
phys_size_t initdram(int board_type)
{
struct jz4740_emc *emc = (struct jz4740_emc *)JZ4740_EMC_BASE;
u32 dmcr;
u32 rows, cols, dw, banks;
ulong size;
dmcr = readl(&emc->dmcr);
rows = 11 + ((dmcr & EMC_DMCR_RA_MASK) >> EMC_DMCR_RA_BIT);
cols = 8 + ((dmcr & EMC_DMCR_CA_MASK) >> EMC_DMCR_CA_BIT);
dw = (dmcr & EMC_DMCR_BW) ? 2 : 4;
banks = (dmcr & EMC_DMCR_BA) ? 4 : 2;
size = (1 << (rows + cols)) * dw * banks;
return size;
}

118
arch/mips/cpu/xburst/jz_serial.c
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/*
* Jz4740 UART support
* Copyright (c) 2011
* Qi Hardware, Xiangfu Liu <xiangfu@sharism.cc>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <asm/io.h>
#include <asm/jz4740.h>
#include <serial.h>
#include <linux/compiler.h>
/*
* serial_init - initialize a channel
*
* This routine initializes the number of data bits, parity
* and set the selected baud rate. Interrupts are disabled.
* Set the modem control signals if the option is selected.
*
* RETURNS: N/A
*/
struct jz4740_uart *uart = (struct jz4740_uart *)CONFIG_SYS_UART_BASE;
static int jz_serial_init(void)
{
/* Disable port interrupts while changing hardware */
writeb(0, &uart->dlhr_ier);
/* Disable UART unit function */
writeb(~UART_FCR_UUE, &uart->iir_fcr);
/* Set both receiver and transmitter in UART mode (not SIR) */
writeb(~(SIRCR_RSIRE | SIRCR_TSIRE), &uart->isr);
/*
* Set databits, stopbits and parity.
* (8-bit data, 1 stopbit, no parity)
*/
writeb(UART_LCR_WLEN_8 | UART_LCR_STOP_1, &uart->lcr);
/* Set baud rate */
serial_setbrg();
/* Enable UART unit, enable and clear FIFO */
writeb(UART_FCR_UUE | UART_FCR_FE | UART_FCR_TFLS | UART_FCR_RFLS,
&uart->iir_fcr);
return 0;
}
static void jz_serial_setbrg(void)
{
u32 baud_div, tmp;
baud_div = CONFIG_SYS_EXTAL / 16 / CONFIG_BAUDRATE;
tmp = readb(&uart->lcr);
tmp |= UART_LCR_DLAB;
writeb(tmp, &uart->lcr);
writeb((baud_div >> 8) & 0xff, &uart->dlhr_ier);
writeb(baud_div & 0xff, &uart->rbr_thr_dllr);
tmp &= ~UART_LCR_DLAB;
writeb(tmp, &uart->lcr);
}
static int jz_serial_tstc(void)
{
if (readb(&uart->lsr) & UART_LSR_DR)
return 1;
return 0;
}
static void jz_serial_putc(const char c)
{
if (c == '\n')
serial_putc('\r');
/* Wait for fifo to shift out some bytes */
while (!((readb(&uart->lsr) & (UART_LSR_TDRQ | UART_LSR_TEMT)) == 0x60))
;
writeb((u8)c, &uart->rbr_thr_dllr);
}
static int jz_serial_getc(void)
{
while (!serial_tstc())
;
return readb(&uart->rbr_thr_dllr);
}
static struct serial_device jz_serial_drv = {
.name = "jz_serial",
.start = jz_serial_init,
.stop = NULL,
.setbrg = jz_serial_setbrg,
.putc = jz_serial_putc,
.puts = default_serial_puts,
.getc = jz_serial_getc,
.tstc = jz_serial_tstc,
};
void jz_serial_initialize(void)
{
serial_register(&jz_serial_drv);
}
__weak struct serial_device *default_serial_console(void)
{
return &jz_serial_drv;
}

179
arch/mips/cpu/xburst/start.S
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/*
* Startup Code for MIPS32 XBURST CPU-core
*
* Copyright (c) 2010 Xiangfu Liu <xiangfu@sharism.cc>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <version.h>
#include <asm/regdef.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/cacheops.h>
.set noreorder
.globl _start
.text
_start:
/* Initialize $gp */
bal 1f
nop
.word _gp
1:
lw gp, 0(ra)
/* Set up temporary stack */
li sp, CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_INIT_SP_OFFSET
la t9, board_init_f
jr t9
nop
/*
* void relocate_code (addr_sp, gd, addr_moni)
*
* This "function" does not return, instead it continues in RAM
* after relocating the monitor code.
*
* a0 = addr_sp
* a1 = gd
* a2 = destination address
*/
.globl relocate_code
.ent relocate_code
relocate_code:
move sp, a0 # set new stack pointer
move s0, a1 # save gd in s0
move s2, a2 # save destination address in s2
li t0, CONFIG_SYS_MONITOR_BASE
sub s1, s2, t0 # s1 <-- relocation offset
la t3, in_ram
lw t2, -12(t3) # t2 <-- __image_copy_end
move t1, a2
add gp, s1 # adjust gp
/*
* t0 = source address
* t1 = target address
* t2 = source end address
*/
1:
lw t3, 0(t0)
sw t3, 0(t1)
addu t0, 4
blt t0, t2, 1b
addu t1, 4
/* If caches were enabled, we would have to flush them here. */
/* flush d-cache */
li t0, KSEG0
addi t1, t0, CONFIG_SYS_DCACHE_SIZE
2:
cache INDEX_WRITEBACK_INV_D, 0(t0)
bne t0, t1, 2b
addi t0, CONFIG_SYS_CACHELINE_SIZE
sync
/* flush i-cache */
li t0, KSEG0
addi t1, t0, CONFIG_SYS_ICACHE_SIZE
3:
cache INDEX_INVALIDATE_I, 0(t0)
bne t0, t1, 3b
addi t0, CONFIG_SYS_CACHELINE_SIZE
/* Invalidate BTB */
mfc0 t0, CP0_CONFIG, 7
nop
ori t0, 2
mtc0 t0, CP0_CONFIG, 7
nop
/* Jump to where we've relocated ourselves */
addi t0, s2, in_ram - _start
jr t0
nop
.word __rel_dyn_end
.word __rel_dyn_start
.word __image_copy_end
.word _GLOBAL_OFFSET_TABLE_
.word num_got_entries
in_ram:
/*
* Now we want to update GOT.
*
* GOT[0] is reserved. GOT[1] is also reserved for the dynamic object
* generated by GNU ld. Skip these reserved entries from relocation.
*/
lw t3, -4(t0) # t3 <-- num_got_entries
lw t8, -8(t0) # t8 <-- _GLOBAL_OFFSET_TABLE_
add t8, s1 # t8 now holds relocated _G_O_T_
addi t8, t8, 8 # skipping first two entries
li t2, 2
1:
lw t1, 0(t8)
beqz t1, 2f
add t1, s1
sw t1, 0(t8)
2:
addi t2, 1
blt t2, t3, 1b
addi t8, 4
/* Update dynamic relocations */
lw t1, -16(t0) # t1 <-- __rel_dyn_start
lw t2, -20(t0) # t2 <-- __rel_dyn_end
b 2f # skip first reserved entry
addi t1, 8
1:
lw t8, -4(t1) # t8 <-- relocation info
li t3, 3
bne t8, t3, 2f # skip non R_MIPS_REL32 entries
nop
lw t3, -8(t1) # t3 <-- location to fix up in FLASH
lw t8, 0(t3) # t8 <-- original pointer
add t8, s1 # t8 <-- adjusted pointer
add t3, s1 # t3 <-- location to fix up in RAM
sw t8, 0(t3)
2:
blt t1, t2, 1b
addi t1, 8 # each rel.dyn entry is 8 bytes
/*
* Clear BSS
*
* GOT is now relocated. Thus __bss_start and __bss_end can be
* accessed directly via $gp.
*/
la t1, __bss_start # t1 <-- __bss_start
la t2, __bss_end # t2 <-- __bss_end
1:
sw zero, 0(t1)
blt t1, t2, 1b
addi t1, 4
move a0, s0 # a0 <-- gd
la t9, board_init_r
jr t9
move a1, s2
.end relocate_code

149
arch/mips/cpu/xburst/timer.c
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/*
* Copyright (c) 2006
* Ingenic Semiconductor, <jlwei@ingenic.cn>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <asm/io.h>
#include <asm/jz4740.h>
#define TIMER_CHAN 0
#define TIMER_FDATA 0xffff /* Timer full data value */
DECLARE_GLOBAL_DATA_PTR;
static struct jz4740_tcu *tcu = (struct jz4740_tcu *)JZ4740_TCU_BASE;
void reset_timer_masked(void)
{
/* reset time */
gd->arch.lastinc = readl(&tcu->tcnt0);
gd->arch.tbl = 0;
}
ulong get_timer_masked(void)
{
ulong now = readl(&tcu->tcnt0);
if (gd->arch.lastinc <= now)
gd->arch.tbl += now - gd->arch.lastinc; /* normal mode */
else {
/* we have an overflow ... */
gd->arch.tbl += TIMER_FDATA + now - gd->arch.lastinc;
}
gd->arch.lastinc = now;
return gd->arch.tbl;
}
void udelay_masked(unsigned long usec)
{
ulong tmo;
ulong endtime;
signed long diff;
/* normalize */
if (usec >= 1000) {
tmo = usec / 1000;
tmo *= CONFIG_SYS_HZ;
tmo /= 1000;
} else {
if (usec > 1) {
tmo = usec * CONFIG_SYS_HZ;
tmo /= 1000*1000;
} else
tmo = 1;
}
endtime = get_timer_masked() + tmo;
do {
ulong now = get_timer_masked();
diff = endtime - now;
} while (diff >= 0);
}
int timer_init(void)
{
writel(TCU_TCSR_PRESCALE256 | TCU_TCSR_EXT_EN, &tcu->tcsr0);
writel(0, &tcu->tcnt0);
writel(0, &tcu->tdhr0);
writel(TIMER_FDATA, &tcu->tdfr0);
/* mask irqs */
writel((1 << TIMER_CHAN) | (1 << (TIMER_CHAN + 16)), &tcu->tmsr);
writel(1 << TIMER_CHAN, &tcu->tscr); /* enable timer clock */
writeb(1 << TIMER_CHAN, &tcu->tesr); /* start counting up */
gd->arch.lastinc = 0;
gd->arch.tbl = 0;
return 0;
}
void reset_timer(void)
{
reset_timer_masked();
}
ulong get_timer(ulong base)
{
return get_timer_masked() - base;
}
void set_timer(ulong t)
{
gd->arch.tbl = t;
}
void __udelay(unsigned long usec)
{
ulong tmo, tmp;
/* normalize */
if (usec >= 1000) {
tmo = usec / 1000;
tmo *= CONFIG_SYS_HZ;
tmo /= 1000;
} else {
if (usec >= 1) {
tmo = usec * CONFIG_SYS_HZ;
tmo /= 1000 * 1000;
} else
tmo = 1;
}
/* check for rollover during this delay */
tmp = get_timer(0);
if ((tmp + tmo) < tmp)
reset_timer_masked(); /* timer would roll over */
else
tmo += tmp;
while (get_timer_masked() < tmo)
;
}
/*
* This function is derived from PowerPC code (read timebase as long long).
* On MIPS it just returns the timer value.
*/
unsigned long long get_ticks(void)
{
return get_timer(0);
}
/*
* This function is derived from PowerPC code (timebase clock frequency).
* On MIPS it returns the number of timer ticks per second.
*/
ulong get_tbclk(void)
{
return CONFIG_SYS_HZ;
}
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